Environmentally friendly neoprene medical gloves and preparation method thereof

Abstract

The invention provides an environment-friendly chloroprene rubber medical glove and a preparation method thereof, wherein the environment-friendly chloroprene rubber medical glove is made of a mixed chloroprene rubber latex; the mixed chloroprene rubber latex comprises the following raw material components by weight: 75.0-100 parts of reinforced vulcanized chloroprene rubber, 10.0-25 parts of reinforced vulcanized natural latex, 3.0-8 parts of carboxylated styrene butadiene rubber latex and 0.5-3 parts of an alkyl sodium sulfate aqueous solution; the invention creatively utilizes the good fluidity of the carboxylated styrene butadiene rubber latex, the good compatibility with chloroprene rubber and natural latex, the self-vulcanization function, and the characteristic that the system film-forming strength can be significantly improved, thereby improving the film-forming property and mechanical property of the chloroprene rubber.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to an environmentally friendly chloroprene rubber medical glove and a preparation method thereof. Background Art

[0002] At present, neoprene is rarely used in the industry to produce medical gloves. The main reason is that when neoprene is prepared into thin products, the tearing force of the product is very low, and it is difficult to meet the requirements of the technical standards for medical gloves. In addition, it has serious flow marks, is thin, and has many pinholes, which affects the appearance quality and product quality of the product. These shortcomings have seriously limited its application in medical gloves. Summary of the invention

[0003] The object of the present invention is to provide an environmentally friendly chloroprene rubber medical glove and a preparation method thereof, so as to solve at least one of the above-mentioned technical problems existing in the prior art.

[0004] In order to solve the above technical problems, the present invention provides an environmentally friendly neoprene medical glove, which is made of mixed neoprene latex;

[0005] The mixed chloroprene rubber latex includes the following raw material components by weight:

[0006] Reinforced vulcanized chloroprene rubber 75.0-100 parts

[0007] Reinforced vulcanized natural latex 10.0-25 parts

[0008] 3.0-8 parts of carboxylated styrene butadiene latex

[0009] 0.5-3 parts of sodium alkyl sulfate aqueous solution;

[0010] Among them, the reinforced vulcanized chloroprene rubber includes the following raw material components by weight:

[0011] Chloroprene latex 70-100 parts

[0012] 3-8 parts of active agent

[0013] Sulfur (S) 0.8-1.0 parts

[0014] Compound antioxidant 0.3-0.5 parts

[0015] Accelerator 0.8-1.0 parts

[0016] 1-5 parts of nano silicon dioxide suspension dispersion

[0017] Emulsifier 0.3-0.6 parts;

[0018] And, the reinforced vulcanized natural latex comprises the following raw material components by weight:

[0019] Natural latex 80-100 parts

[0020] 1-5 parts of nano silicon dioxide suspension dispersion

[0021] Stabilizer 0.1-0.2 parts

[0022] Accelerator 0.4-0.6 parts

[0023] Sulfur (S) 0.8-1 part

[0024] Antioxidant 0.8-1.2 parts

[0025] Active agent 0.3-0.5 parts

[0026] Diffuser 0.03-0.05 parts.

[0027] The present application also discloses a method for preparing the above-mentioned environmentally friendly neoprene medical gloves, which comprises the following steps:

[0028] S10 cleaning the mold, and drying the mold after cleaning;

[0029] S20. Immersing the dried mold in a coagulant, and then removing the dried mold;

[0030] S30. The mold is immersed in the mixed chloroprene rubber emulsion, and then the mold attached with the mixed chloroprene rubber emulsion is removed and dried;

[0031] S40. The mold is immersed in softened water, and the mixed chloroprene rubber is leached to form a leached latex film on the surface of the mold, and then removed and dried;

[0032] S50. The mold is immersed in the coating liquid, so that the surface of the leached latex film is covered with the coating; then taken out and dried with low-temperature air blast;

[0033] S60. The latex film after drying is curled, and then the latex film is dried and vulcanized;

[0034] S70. Demoulding to obtain the environmentally friendly neoprene medical gloves.

[0035] Furthermore, in step S30, the temperature of the mixed chloroprene rubber emulsion is 25-28°C.

[0036] Furthermore, in step S30, the mold stays in the mixed chloroprene rubber latex for 8-12 seconds.

[0037] Furthermore, in step S50, the low-temperature blast drying temperature is 60-80°C.

[0038] Furthermore, in step S20, the temperature of the coagulant is 48-60°C, and the mold stays in the coagulant for 3-5 seconds.

[0039] Furthermore, when preparing the mixed chloroprene rubber latex, the reinforced vulcanized chloroprene rubber, the reinforced vulcanized natural latex, the carboxylated styrene-butadiene rubber latex and the aqueous solution of sodium alkyl sulfate are mixed and then stirred sufficiently (2.0-3.0 hours).

[0040] Furthermore, the preparation method of the reinforced vulcanized chloroprene rubber comprises the following steps:

[0041] L10. Add the emulsifier and nano-silicon dioxide suspension dispersion to the chloroprene rubber latex at room temperature and stir thoroughly;

[0042] L20. After heating to 32-35℃, add sulfur, activator, composite antioxidant and accelerator in sequence, then stir and heat to 45-48℃ for constant temperature vulcanization, and the vulcanization time is more than 10 hours.

[0043] Furthermore, the preparation method of reinforced vulcanized natural latex comprises the following steps:

[0044] H10. Put the natural rubber latex into a stirring tank, add the stabilizer and the dispersant in sequence while stirring; then gradually heat to 30℃~45℃, and continue stirring for no less than 3 hours;

[0045] H20. Keep the rubber temperature above 36°C, add sulfur, accelerator, antioxidant (anti-aging agent), and activator in sequence; continue heating to 40-55°C; keep warm for 4 hours to obtain reinforced vulcanized natural latex.

[0046] Furthermore, the stabilizer is one or two of potassium hydroxide, sodium hydroxide, casein, and ammonia water.

[0047] Furthermore, the accelerator is one or both of accelerator ZDC (zinc diethyldithiocarbamate) and accelerator PX (zinc ethylphenyldithiocarbamate).

[0048] Furthermore, the antioxidant is one or both of 264 (BHT2,6-di-tert-butyl-p-cresol) and SP-P styrenated phenol.

[0049] Furthermore, the active agent is one or more zinc salts such as zinc oxide and zinc carbonate.

[0050] Furthermore, the diffusing agent is one or more of Peregal O, NF (disodium methylene naphthalene sulfonate) and the like.

[0051] Furthermore, the emulsifier is sodium dodecyl sulfate or sodium dodecylbenzene sulfonate.

[0052] By adopting the above technical solution, the present invention has the following beneficial effects:

[0053] The present invention creatively utilizes the good fluidity of carboxylated styrene butadiene latex, and has good compatibility with chloroprene rubber and natural latex, has a self-vulcanization function, and can significantly improve the film-forming strength of the system, thereby improving the film-forming performance and mechanical properties of chloroprene rubber.

[0054] The invention adds a proper amount of reinforced vulcanized natural latex into the system, which does not affect the chemical properties (oil resistance, acid and alkali resistance, solvent resistance) and physical properties (breaking force, breaking elongation) of chloroprene rubber, and can fully utilize the advantages of the reinforced vulcanized natural latex, such as excellent film-forming properties and mechanical properties, and has a significant improvement effect on improving the defects of chloroprene rubber in preparing medical gloves, such as thinness, many pinholes, and uneven film formation.

[0055] In addition, an alkyl sodium sulfate aqueous solution is used as the surface tension of the balance system to improve the fluidity of the system, improve the marks and pinhole problems of the gloves. A nano-silicon dioxide suspension dispersion is added to the pre-vulcanization system and mixed and stirred evenly before co-vulcanization. This not only utilizes the characteristics of the three-dimensional mesh nano-silicon dioxide suspension dispersion and chloroprene rubber and natural latex to form a strong mesh structure during vulcanization, but also significantly improves the tensile stress inside the material, so that when preparing medical gloves (thin products), the tensile strength of the product is greatly improved, and finally reaches the technical standard requirements of disposable rubber gloves. The nano-silicon dioxide suspension dispersion can also significantly improve the fluidity of the system, effectively improving the serious problem of chloroprene rubber marks.

[0056] The invention also vulcanizes the chloroprene rubber with a stabilizer such as sodium alkyl sulfate, and then adds a proper amount of vulcanized natural latex, so that no flocculation occurs when the anionic chloroprene rubber latex and the anionic natural latex are mixed.

[0057] By adding nano-silicon dioxide suspension dispersion into the pre-vulcanization system and adding natural latex with a total solid content of 35-40% into the vulcanized chloroprene rubber, the viscosity of the vulcanized chloroprene rubber latex was reduced from the original 28.1MPa·s to 7.85MPa·s, and the fluidity of the mixed latex was significantly improved, which significantly improved the defects of chloroprene rubber medical gloves such as thinness, uneven film formation, many pinholes, and severe flow marks. DETAILED DESCRIPTION

[0058] The embodiments of the present invention will be described in detail below in conjunction with the examples, but it will be appreciated by those skilled in the art that the following examples are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention. If specific conditions are not specified in the examples, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0059] The present invention is further explained below in conjunction with specific implementation modes.

[0060] Example 1

[0061] This embodiment discloses an environmentally friendly chloroprene rubber medical glove, which is made of a mixed chloroprene rubber latex; and the mixed chloroprene rubber latex includes: reinforced vulcanized chloroprene rubber, reinforced vulcanized natural latex, carboxylated styrene butadiene rubber latex and an aqueous solution of sodium alkyl sulfate.

[0062] Among them, the reinforced vulcanized chloroprene rubber includes the following raw material components by weight:

[0063] 70 parts of chloroprene rubber latex;

[0064] 3 parts of active agent;

[0065] Sulfur (S) 0.8 parts;

[0066] 0.3 parts of compound antioxidant;

[0067] 0.8 part of accelerator;

[0068] 1 part of nano-silicon dioxide suspension dispersion;

[0069] Emulsifier 0.3 parts.

[0070] The preparation method of reinforced vulcanized chloroprene rubber is as follows:

[0071] At room temperature, first add the emulsifier and nano-silicon dioxide suspension dispersion into the chloroprene rubber latex, then heat it to 32-35°C and add sulfur (S), activator, composite antioxidant and accelerator in sequence, then stir and heat it to 45-48°C for constant temperature vulcanization, and the vulcanization time is more than 10 hours.

[0072] Reinforced vulcanized natural latex comprises the following raw material components by weight:

[0073] 80 parts of natural rubber latex;

[0074] 1 part of nano-silicon dioxide suspension dispersion;

[0075] Stabilizer 0.1 part;

[0076] 0.4 parts of accelerator;

[0077] Sulfur (S) 0.8 parts;

[0078] 0.8 parts of antioxidant;

[0079] 0.3 parts of active agent;

[0080] 0.03 parts of diffusant.

[0081] The preparation method of reinforced vulcanized natural latex is as follows:

[0082] ①Put 90 parts of natural latex into a latex preparation tank, and add 0.1 parts of stabilizer and 0.01 parts of dispersant in sequence while stirring; turn on the hot water circulation pump to increase the temperature, and pre-treat the latex by circulating hot water in the jacket of the latex preparation tank (the water temperature of the jacket of the latex preparation tank shall not exceed 55°C during the whole process), and keep the temperature between 30°C and 45°C for 4 hours.

[0083] ② When the glue temperature is above 36℃, add 0.8 parts of sulfur, 0.4 parts of accelerator, 0.8 parts of antioxidant and 0.3 parts of activator in sequence; continue to raise the temperature to 40-55℃; keep warm for 5 hours.

[0084] Among them, the stabilizer can be one or two of potassium hydroxide, sodium hydroxide, casein, and ammonia water; the accelerator can be one or two of accelerator ZDC (zinc diethyldithiocarbamate) and accelerator PX (zinc ethylphenyldithiocarbamate); the antioxidant can be one or two of 264 (BHT2,6-di-tert-butyl-p-cresol) and SP-P styrenated phenol; the activator can be one or more of zinc salts such as zinc oxide and zinc carbonate; the diffusant can be one or more of peregrate O, NF (disodium methylene dinaphthalene sulfonate) and the like; the emulsifier can be sodium dodecyl sulfate and sodium dodecylbenzene sulfonate.

[0085] In the present embodiment, the mixed chloroprene rubber latex comprises the following raw material components by weight:

[0086] 75.0 parts of reinforced vulcanized chloroprene rubber;

[0087] 10.0 parts of reinforced vulcanized natural latex;

[0088] 3.0 parts of carboxylated styrene butadiene latex;

[0089] 0.5 parts of sodium alkyl sulfate aqueous solution.

[0090] Take 75 parts of reinforced vulcanized chloroprene rubber, add 10.0 parts of carboxylated styrene butadiene rubber latex, add 0.5 parts of alkyl sodium sulfate aqueous solution, stir for 2.0 hours to obtain a uniformly mixed chloroprene rubber latex for use.

[0091] The method for preparing medical gloves comprises the following steps:

[0092] 1) Clean the mold and dry the cleaned mold;

[0093] 2) Immerse the dried mold in a coagulant at a temperature of 48-60°C and keep the mold in the coagulant for 3-5 seconds;

[0094] 3) Dry the mold with the coagulant attached, and then immerse it in the mixed chloroprene rubber latex. The temperature of the mixed chloroprene rubber latex is room temperature (25-28) °C. The mold stays in the mixed chloroprene rubber latex for 25-35 seconds. Take out the mold with the mixed chloroprene rubber latex and dry it. Then, immerse the dried mold with the mixed chloroprene rubber attached in softened water for leaching to form a pre-leached latex film. Then, take it out and dry it.

[0095] 4) Immerse the mold in the coating, then take it out and dry it with low-temperature air (temperature is 60-80°C), and then curl it to form a curled latex film; dry and vulcanize the mold with the curled film, and then demold it to obtain an excellent performance and environmentally friendly neoprene medical glove.

[0096] Example 2

[0097] This embodiment is basically the same as Embodiment 1, except that:

[0098] 1) Reinforced vulcanized chloroprene rubber includes the following raw material components by weight:

[0099] 80 parts of chloroprene rubber latex;

[0100] 4 parts of active agent;

[0101] Sulfur (S) 0.8 parts;

[0102] 0.4 parts of compound antioxidant;

[0103] 0.8 part of accelerator;

[0104] 2 parts of nano-silicon dioxide suspension dispersion;

[0105] Emulsifier 0.4 parts;

[0106] 2) The reinforced natural latex includes the following raw material components by weight:

[0107] 85 parts of natural rubber latex;

[0108] 3 parts of nano-silicon dioxide suspension dispersion;

[0109] 0.15 parts of stabilizer;

[0110] 0.5 part of accelerator;

[0111] Sulfur (S) 0.9 parts;

[0112] 0.8 parts of antioxidant;

[0113] 0.3 parts of active agent;

[0114] Diffuser 0.03 parts;

[0115] The preparation method of reinforced vulcanized natural latex is as follows:

[0116] ① Press 85 parts of natural latex into a latex preparation tank, and add 0.15 parts of stabilizer and 0.03 parts of dispersant in sequence while stirring; turn on the hot water circulation pump to increase the temperature, and pre-treat the latex by circulating hot water in the jacket (the water temperature of the jacket of the latex preparation tank shall not exceed 55°C during the whole process), keep the temperature between 30°C and 45°C, and keep the temperature constant for 4 hours.

[0117] ② When the glue temperature is above 36℃, add 0.9 parts of sulfur, 0.5 parts of accelerator, 0.8 parts of antioxidant and 0.3 parts of activator in sequence; continue to raise the temperature to 40-55℃; keep warm for 6 hours.

[0118] ③The stabilizer can be one or two of potassium hydroxide, sodium hydroxide, casein, and ammonia water; the accelerator can be one or two of accelerator ZDC (zinc diethyldithiocarbamate) and accelerator PX (zinc ethylphenyldithiocarbamate); the antioxidant can be one or two of 264 (BHT2,6-di-tert-butyl-p-cresol) and SP-P styrenated phenol; the activator can be one or more of zinc salts such as zinc oxide and zinc carbonate; the dispersant can be one or more of peregal O, NF (disodium methylene dinaphthalene sulfonate) and the like.

[0119] In the present embodiment, the mixed chloroprene rubber latex comprises the following raw material components by weight:

[0120] 80.0 parts of reinforced vulcanized chloroprene rubber;

[0121] 10 parts of reinforced vulcanized natural latex;

[0122] 4.0 parts of carboxylated styrene butadiene latex;

[0123] 0.6 parts of sodium alkyl sulfate aqueous solution.

[0124] Take 80 parts of reinforced vulcanized chloroprene rubber, add 10.0 parts of reinforced vulcanized natural latex, add 4.0 parts of carboxylated styrene butadiene latex, and then add 0.6 parts of alkyl sodium sulfate aqueous solution, stir for 2.0-3.0 hours to obtain a uniform mixed emulsion for use.

[0125] Example 3

[0126] This embodiment is basically the same as Embodiment 1, except that:

[0127] 1) Reinforced vulcanized chloroprene rubber includes the following raw material components by weight:

[0128] 90.0 parts of chloroprene rubber latex;

[0129] Active agent 5.0 parts;

[0130] Sulfur (S) 0.9 parts;

[0131] 0.4 parts of compound antioxidant;

[0132] Accelerator 0.9 parts;

[0133] 3.0 parts of nano-silicon dioxide suspension dispersion;

[0134] 0.5 part of emulsifier;

[0135] At room temperature, first add emulsifier and nano-silicon dioxide suspension dispersion into the chloroprene rubber latex, then heat it to 32-35°C and add S, activator, composite antioxidant and accelerator in sequence, then stir and heat it to 45-48°C for constant temperature vulcanization, and the vulcanization time is more than 10 hours.

[0136] 2) The reinforced natural latex includes the following raw material components by weight:

[0137] Natural rubber latex 90 parts;

[0138] 4 parts of nano-silicon dioxide suspension dispersion;

[0139] 0.2 parts of stabilizer;

[0140] 0.5 part of accelerator;

[0141] Sulfur (S) 0.9 parts;

[0142] 1.0 part of antioxidant;

[0143] 0.5 parts of active agent;

[0144] 0.4 parts of diffusant.

[0145] ① Press the natural latex into the latex preparation tank, add the stabilizer and dispersant in sequence while stirring; turn on the hot water circulation pump to increase the temperature, and pre-treat the latex by circulating hot water in the jacket (the water temperature of the latex preparation tank jacket shall not exceed 55°C during the whole process), the temperature is between 30°C and 45°C, and the treatment time is not less than 3 hours.

[0146] ② When the glue temperature is above 36℃, add vulcanizer, accelerator, antioxidant and activator in sequence; continue to raise the temperature to 40-55℃; keep warm for 4 hours for standby use.

[0147] ③ The stabilizer can be one or two of potassium hydroxide, sodium hydroxide, casein, and ammonia water; the accelerator can be one or two of accelerator ZDC (zinc diethyldithiocarbamate) and accelerator PX (zinc ethylphenyldithiocarbamate); the antioxidant can be one or two of 264 (BHT2,6-di-tert-butyl-p-cresol) and SP-P styrenated phenol; the activator can be one or more of zinc salts such as zinc oxide and zinc carbonate; the diffusant can be one or more of peregrate O, NF (disodium methylene dinaphthalene sulfonate) and the like; the emulsifier can be sodium dodecyl sulfate and sodium dodecylbenzene sulfonate.

[0148] In the present embodiment, the mixed chloroprene rubber latex comprises the following raw material components by weight:

[0149] 85 parts of reinforced vulcanized chloroprene rubber;

[0150] 15 parts of reinforced vulcanized natural latex;

[0151] 5 parts of carboxylated styrene butadiene latex;

[0152] 1.0 part of sodium alkyl sulfate aqueous solution.

[0153] Example 4

[0154] This embodiment is basically the same as Embodiment 1, except that:

[0155] 1) Reinforced vulcanized chloroprene rubber includes the following raw material components by weight:

[0156] 95 parts of chloroprene rubber latex;

[0157] Active agent 5 parts;

[0158] Sulfur (S) 1.0 part;

[0159] 0.5 parts of compound antioxidant;

[0160] 1.0 part of accelerator;

[0161] 4 parts of nano-silicon dioxide suspension dispersion;

[0162] Emulsifier 0.6 part;

[0163] At room temperature, first add emulsifier and nano-silicon dioxide suspension dispersion into the chloroprene rubber latex, then heat it to 32-35°C and add S, activator, composite antioxidant and accelerator in sequence, then stir and heat it to 45-48°C for constant temperature vulcanization, and the vulcanization time is more than 10 hours.

[0164] 2) The reinforced natural latex includes the following raw material components by weight:

[0165] Natural rubber latex 95 parts;

[0166] 4 parts of nano-silicon dioxide suspension dispersion;

[0167] 0.2 parts of stabilizer;

[0168] 0.6 part of accelerator;

[0169] Sulfur (S) 1.0 part;

[0170] 1.2 parts of antioxidant;

[0171] 0.5 parts of active agent;

[0172] 0.05 parts of diffusant.

[0173] ① Press the natural latex into the latex preparation tank, add the stabilizer and dispersant in sequence while stirring; turn on the hot water circulation pump to increase the temperature, and pre-treat the latex by circulating hot water in the jacket (the water temperature of the latex preparation tank jacket shall not exceed 55°C during the whole process), the temperature is between 30°C and 45°C, and the treatment time is not less than 3 hours.

[0174] ② When the glue temperature is above 36℃, add vulcanizer, accelerator, antioxidant and activator in sequence; continue to raise the temperature to 40-55℃; keep warm for 4 hours for standby use.

[0175] ③ The stabilizer can be one or two of potassium hydroxide, sodium hydroxide, casein, and ammonia water; the accelerator can be one or two of accelerator ZDC (zinc diethyldithiocarbamate) and accelerator PX (zinc ethylphenyldithiocarbamate); the antioxidant can be one or two of 264 (BHT2,6-di-tert-butyl-p-cresol) and SP-P styrenated phenol; the activator can be one or more of zinc salts such as zinc oxide and zinc carbonate; the diffusant can be one or more of peregrate O, NF (disodium methylene dinaphthalene sulfonate) and the like; the emulsifier can be sodium dodecyl sulfate and sodium dodecylbenzene sulfonate.

[0176] In the present embodiment, the mixed chloroprene rubber latex comprises the following raw material components by weight:

[0177] 90 parts of reinforced vulcanized chloroprene rubber;

[0178] 20 parts of reinforced vulcanized natural latex;

[0179] 6 parts of carboxylated styrene butadiene latex;

[0180] 1.2 parts of sodium alkyl sulfate aqueous solution.

[0181] Example 5

[0182] This embodiment is basically the same as Embodiment 1, except that:

[0183] 1) Reinforced vulcanized chloroprene rubber includes the following raw material components by weight:

[0184] 100 parts of chloroprene rubber latex;

[0185] Active agent 5 parts;

[0186] Sulfur (S) 1.0 part;

[0187] 0.5 parts of compound antioxidant;

[0188] 1.0 part of accelerator;

[0189] 5 parts of nano-silicon dioxide suspension dispersion;

[0190] Emulsifier 0.6 part;

[0191] At room temperature, first add emulsifier and nano-silicon dioxide suspension dispersion into the chloroprene rubber latex, then heat it to 32-35°C and add S, activator, composite antioxidant and accelerator in sequence, then stir and heat it to 45-48°C for constant temperature vulcanization, and the vulcanization time is more than 10 hours.

[0192] 2) The reinforced natural latex includes the following raw material components by weight:

[0193] 100 parts of natural rubber latex;

[0194] 5 parts of nano-silicon dioxide suspension dispersion;

[0195] 0.2 parts of stabilizer;

[0196] 0.6 part of accelerator;

[0197] Sulfur (S) 1.0 part;

[0198] 1.0 part of antioxidant;

[0199] 0.5 parts of active agent;

[0200] 0.05 parts of diffusant.

[0201] ① Press the natural latex into the latex preparation tank, add the stabilizer and dispersant in sequence while stirring; turn on the hot water circulation pump to increase the temperature, and pre-treat the latex by circulating hot water in the jacket (the water temperature of the latex preparation tank jacket shall not exceed 55°C during the whole process), the temperature is between 30°C and 45°C, and the treatment time is not less than 3 hours.

[0202] ② When the glue temperature is above 36℃, add vulcanizer, accelerator, antioxidant and activator in sequence; continue to raise the temperature to 40-55℃; keep warm for 4 hours for standby use.

[0203] ③ The stabilizer can be one or two of potassium hydroxide, sodium hydroxide, casein, and ammonia water; the accelerator can be one or two of accelerator ZDC (zinc diethyldithiocarbamate) and accelerator PX (zinc ethylphenyldithiocarbamate); the antioxidant can be one or two of 264 (BHT2,6-di-tert-butyl-p-cresol) and SP-P styrenated phenol; the activator can be one or more of zinc salts such as zinc oxide and zinc carbonate; the diffusant can be one or more of peregrate O, NF (disodium methylene dinaphthalene sulfonate) and the like; the emulsifier can be sodium dodecyl sulfate and sodium dodecylbenzene sulfonate.

[0204] In the present embodiment, the mixed chloroprene rubber latex comprises the following raw material components by weight:

[0205] 100 parts of reinforced vulcanized chloroprene rubber;

[0206] 25.0 parts of reinforced vulcanized natural latex;

[0207] 8.0 parts of carboxylated styrene butadiene latex;

[0208] 1.2 parts of sodium alkyl sulfate aqueous solution.

[0209] Comparative Example 1

[0210] This comparative example adopts the existing technology to prepare neoprene gloves.

[0211] Vulcanized chloroprene rubber includes the following raw material components by weight:

[0212] 100 parts of chloroprene rubber latex;

[0213] Active agent 5 parts;

[0214] Sulfur (S) 1.0 part;

[0215] 0.5 parts of compound antioxidant;

[0216] 1.0 part of accelerator;

[0217] Emulsifier 0.6 parts.

[0218] Mechanical properties of the examples and comparative examples:

[0219]

[0220] Through experiments, it can be known that the present invention creatively utilizes the good fluidity of carboxylated styrene butadiene latex, and has good compatibility with chloroprene rubber and natural latex, has self-vulcanization function, and can significantly improve the film-forming strength of the system, and improve the film-forming performance and mechanical properties of chloroprene rubber. While not reducing the chemical (oil resistance, acid and alkali resistance, solvent resistance) and physical properties (tear force, elongation at break) performance, it fully utilizes the advantages of excellent film-forming performance and mechanical properties of natural latex after reinforcement and vulcanization, and improves the defects of chloroprene rubber in preparing medical gloves, such as thinness, many pinholes, and uneven film formation.

[0221] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing environmentally friendly chloroprene medical gloves, characterized in that: Environmentally friendly neoprene medical gloves are made of mixed neoprene latex; The mixed chloroprene rubber latex includes the following raw material components by weight: Reinforced vulcanized chloroprene rubber 75.0-100 parts Reinforced vulcanized natural latex 10.0-25 parts 3.0-8 parts of carboxylated styrene butadiene latex 0.5-3 parts of sodium alkyl sulfate aqueous solution; Among them, the reinforced vulcanized chloroprene rubber includes the following raw material components by weight: Chloroprene latex 70-100 parts 3-8 parts of active agent Sulfur 0.8-1.0 parts Compound antioxidant 0.3-0.5 parts Accelerator 0.8-1.0 parts 1-5 parts of nano silicon dioxide suspension dispersion Emulsifier 0.3-0.6 parts; And, the reinforced vulcanized natural latex comprises the following raw material components by weight: Natural latex 80-100 parts 1-5 parts of nano silicon dioxide suspension dispersion Stabilizer 0.1-0.2 parts Accelerator 0.4-0.6 parts Sulfur 0.8-1 part Antioxidant 0.8-1.2 parts Active agent 0.3-0.5 parts Diffusant 0.03-0.05 parts; The preparation method comprises the following steps: S10 cleaning the mold, and drying the mold after cleaning; S20. Immersing the dried mold in a coagulant, and then removing the dried mold; S30. The mold is immersed in the mixed chloroprene rubber emulsion, and then the mold attached with the mixed chloroprene rubber emulsion is removed and dried; S40. The mold is immersed in softened water, and the mixed chloroprene rubber is leached to form a leached latex film on the surface of the mold, and then removed and dried; S50. The mold is immersed in the coating liquid, so that the surface of the leached latex film is covered with the coating; then taken out and dried with low-temperature air blast; S60. The latex film after drying is curled, and then the latex film is dried and vulcanized; S70. Demoulding to obtain the environmentally friendly neoprene medical gloves.

2. The preparation method according to claim 1, characterized in that: In step S30, the mold stays in the mixed chloroprene rubber latex for 8-12 seconds.

3. The preparation method according to claim 1, characterized in that: In step S50, the low-temperature blast drying temperature is 60-80°C.

4. The preparation method according to claim 1, characterized in that: In step S20, the temperature of the coagulant is 48-60°C, and the mold stays in the coagulant for 3-5 seconds.

5. The preparation method according to claim 1, characterized in that: When preparing the mixed chloroprene rubber latex, the reinforced vulcanized chloroprene rubber, the reinforced vulcanized natural latex, the carboxylated styrene-butadiene rubber latex and the alkyl sodium sulfate aqueous solution are mixed and then stirred thoroughly.

6. The preparation method according to claim 1, characterized in that: The preparation method of reinforced vulcanized chloroprene rubber comprises the following steps: L10. Add the emulsifier and nano-silicon dioxide suspension dispersion to the chloroprene rubber latex at room temperature and stir thoroughly; L20. After heating to 32-35℃, add sulfur, activator, composite antioxidant and accelerator in sequence, then stir and heat to 45-48℃ for constant temperature vulcanization, and the vulcanization time is more than 10 hours.

7. The preparation method according to claim 1, characterized in that: The preparation method of reinforced vulcanized natural latex comprises the following steps: H10. Put the natural rubber latex into a stirring tank, add the stabilizer and the dispersant in sequence while stirring; then gradually heat to 30℃~45℃, and continue stirring for no less than 3 hours; H20. Keep the rubber temperature above 36°C, add sulfur, accelerator, antioxidant and activator in sequence; continue heating to 40-55°C; keep warm for 4 hours to obtain reinforced vulcanized natural latex.

8. The preparation method according to claim 1, characterized in that: The stabilizer is one or two of potassium hydroxide, sodium hydroxide, casein and ammonia water.

9. The preparation method according to claim 1, characterized in that: The accelerator is one or both of accelerator ZDC and accelerator PX; And / or, the antioxidant is one or both of 264 and SP-P styrenated phenol; And / or, the active agent is one or more of zinc oxide and zinc carbonate; And / or, the diffusing agent is one or more of peregal O and disodium methylene naphthalene sulfonate; And / or, the emulsifier is sodium dodecyl sulfate or sodium dodecylbenzene sulfonate.

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